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What size gas port?

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01-07-2008, 09:59 AM

silvery37

silvery37 is offline

Junior Member

Join Date: Dec 2007

Posts: 9

What size gas port?

I have an 300 whisper AR with a 16'' noveske barrel. I made some loads using accr no 9 and 220 grain matchkings. The action would not fully cycle. I loaded up to a little beyond supersonic with the 220s and the action would still not cycle. The best measurement I could get on the gas port was right around .07. Is this too small or was the powder too fast?

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